This question was previously asked in

UP Police ASI Official Paper 1 (Held On: 22 Dec 2018 Shift 1)

- 50 metres
- 60 metres
- 30 metres
- 40 metres

Option 4 : 40 metres

According to the question:

Using the Pythagoras theorem,

AC² = AB² + BC²

⇒ 50² = AB² + 30²

⇒ AB² = 50² - 30²

⇒ AB² = 2500 - 900

⇒ AB² = 1600 m²

⇒ AB = 40 m

Hence, he first walked **40 m** towards the south and then turned to his left.

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